Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd725901059f7593…

MALICIOUS

PDF

106.3 KB Created: 2021-04-05 21:36:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 627e4408415a709359842716adef62f1 SHA-1: b912e072b2975fe6269604895cb4b6d52ab0f450 SHA-256: bd725901059f759347b2223bf44b0386e6fe41df03bbe7f8cba4b9df524edbfb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, flagged by ML and ClamAV as malicious phishing content. The document body, though heavily obfuscated, contains keywords related to 'Navien ncb 240e dip switch settings', suggesting a lure to a malicious site. No scripts were extracted, but the PDF structure itself is designed to redirect the user to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/strik?utm_term=navien+ncb+240e+dip+switch+settings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489404/normal_5fd2fb2e3b49e.pdfIn PDF document text
    • https://cdn.sqhk.co/kijowevo/iiaiheG/vikarutorepexorekosepi.pdfIn PDF document text
    • http://befigter.xyz/the_murder_book_examining_homiciderukbc.pdfIn PDF document text
    • https://cdn.sqhk.co/govonesed/lyhbejd/15293461904.pdfIn PDF document text
    • http://perfectiona.online/game_naruto_shippuden_mobile_fighter0urcd.pdfIn PDF document text
    • http://xtreme-sport.ru/2621085824psno0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496153/normal_605681d68dfbf.pdfIn PDF document text
    • http://kinorio5.xyz/19526880127bn7q1.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/oCqZcRH/japeporovivorujomeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0989627-7a7e-4333-a966-8c8a8ffb2f7b/xufipogade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504179d1-72b5-49f2-8302-a412ed34c5dd/20577361098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9767a227-0f02-4824-aca0-c86db361858f/penoteruruzixoledogesine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f755d283-b10b-482c-9cb3-e4a95f76afde/how_to_refill_a_heavy_duty_swingline_stapler.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b117df4d-3cd6-4354-9e4c-d326960f6686/46290253279.pdfIn PDF document text
    • https://4c80ca50-31de-4e6f-b265-471620011c4a.filesusr.com/ugd/08c6b7_0dd3c853241b4860a88b9e0e7ddfb123.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_cdc894df378c42b98653dfa24d770039.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d1f48a-c550-4464-8ac0-f1baef5bac38/king_of_my_heart_chords_bethel.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EF9 5828 bytes
SHA-256: 0c291ac98847ece2a8a7125d74586fd105aa06f64a5328090f16524200180700
font_01_sfnt_off000152f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F1 2168 bytes
SHA-256: 224dfc1c4c166ba1dd370a93ff9e22fd9f28ee6fbbe7e759ed3b181a6ed8618c
font_02_sfnt_off00015c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C50 12656 bytes
SHA-256: 9c5589da01b82c9f738544d77893beede585030b810bc2ecbf480a1e91431d62
font_03_sfnt_off00018607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18607 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

Open this report in the interactive analyzer, or submit your own file for analysis.